E63 REGULAR PROBLEMS

HI; I have a 2010 E63 and so far it has been off the road for about 40 days in the first 12 months. Catastrophic engine failure that took 30 days to repair, shaking at idle; surges forward when you touch the accelerator from idle, cracking sounds from the glass sunroof, loses the garage remote program and now been in the shop 3 times to try and stop a groaning noise when the wheels are turned. Dealer says it needs 4 new shocks and now additional factory suggested changes. Driving me nuts.
Has anyone out there had problems like this?
Has anyone out there advice on what to do re returning it as a LEMON.
Thanks
roger